How to open the attachment called “winmail.dat”.
Users. The attachment called “winmail.dat” is the special format called “TNEF-encoded messages” for Microsoft Outlook (E-mail software). Basically, this file cannot open except Microsoft Outlook. Information: http://kb.mozillazine.org/Winmail.dat_attachments There are the following two correspondences (Best) Change E-mail setting of sender. Use of special software for opening “winmail.dat”. In case of no.1, please see “Disable TNEF-encoded messages at Microsoft Outlook”. Disable “TNEF-encoded messages” at Microsoft Outlook. Outlook 2003 In “HKEY_CURRENT_USER\Software\Microsoft\Office\11.0\Outlook\Options\Mail”, The value of DontEncodeCustomNote changes to 1. (If there is not the value, please create it.) Outlook 2007 In “HKEY_CURRENT_USER\Software\Microsoft\Office\12.0\Outlook\Options\Mail”, The value of DontEncodeCustomNote changes to 1. (If there is not the value, please create it.) In case o...